{
  "manageEntity": {
    "action": "Save",
    "entityId": "1497999873",
    "entityType": "Track",
    "nonce": "0x2a9cbeaaf517dbea33220e3ee670b02c95ffeafc8b58209a15d8895f2e957e29",
    "signature": "0xb685dfc16a70dbbeecffe2f565c81ede543469ffa46b6b7986fdd47f2d03e7135838795ddb9e7988c48095a5adb90ab6c188a225ca63ebe225a00177e7493fbd1b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}